//
//  TestRecordableLayer.swift
//  SCNRecorderTests
//
//  Created by Vladislav Grigoryev on 04.12.2020.
//  Copyright © 2020 GORA Studio. https://gora.studio
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the "Software"), to deal
//  in the Software without restriction, including without limitation the rights
//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//  THE SOFTWARE.

import Foundation
import UIKit
import Metal

@testable import SCNRecorder

final class TestRecordableLayer: CAMetalLayer, MetalRecordable {

  enum Error: Swift.Error {

    case cantCreateSystemDefaultDevice
  }

  #if !targetEnvironment(simulator)
  static let testPixelFormats: Set<MTLPixelFormat> = Set([
    .bgra8Unorm, .bgra8Unorm_srgb,
    .bgr10_xr, .bgr10_xr_srgb,
    .bgra10_xr, .bgra10_xr_srgb
  ])
  #else
  static let testPixelFormats: Set<MTLPixelFormat> = Set([
    .bgra8Unorm
  ])
  #endif

  static let defaultSize = CGSize(width: 1920, height: 1080)

  var recordableLayer: RecordableLayer? { self }

  let testRenderer: TestRenderer

  init(
    pixelFormat: MTLPixelFormat,
    size: CGSize = defaultSize
  ) throws {
    guard let device = MTLCreateSystemDefaultDevice() else {
      throw Error.cantCreateSystemDefaultDevice
    }

    testRenderer = try TestRenderer(
      viewportSize: size,
      device: device,
      pixelFormat: pixelFormat
    )

    super.init()
    self.frame = CGRect(origin: .zero, size: size)
    self.pixelFormat = pixelFormat
    self.device = device
  }

  required init?(coder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
  }

  func render() throws { try testRenderer.renderToMetalLayer(self) }
}
